Determination of the fine structure constant with atom interferometry and Bloch oscillations
Résumé
We use Bloch oscillations to transfer coherently many photon momenta to atoms. Then we can measure accurately the recoil velocity $\hbar k/m$ and deduce the fine structure constant $\alpha$. The velocity variation due to Bloch oscillations is measured using atom interferometry. This method yields to a value of the fine structure constant $\alpha^{-1}= 137.035\,999\,45\,(62)$ with a relative uncertainty of about $4.5 \times 10^{-9}$.
Domaines
Physique Atomique [physics.atom-ph]| Origine | Fichiers produits par l'(les) auteur(s) |
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